LMC6034 - CMOS Quad Operational Amplifier

Overview

The LMC6034 is a high-performance CMOS quad operational amplifier designed for versatile applications in both single-supply and dual-supply configurations. This component combines the benefits of CMOS technology with precision analog performance, making it suitable for a wide range of industrial, automotive, and consumer electronics applications. With its ability to operate with an input common-mode range that includes ground, the LMC6034 is particularly useful in low-voltage and battery-powered systems.

The device features low power consumption while maintaining excellent signal integrity, offering designers a reliable solution for signal conditioning, filtering, and general amplification tasks. Its quad configuration provides space-saving integration for systems requiring multiple amplifier channels.

Features

• Quad operational amplifier in a single package
• Wide supply voltage range: 3V to 15V single supply or ±1.5V to ±7.5V dual supplies
• Input common-mode range includes ground (V-)
• Low input bias current: typically 0.04 pA
• High voltage gain: typically 100 dB
• Low power consumption: typically 200 µA per amplifier
• Rail-to-rail output swing
• Low input offset voltage: typically 1 mV
• Unity-gain stable
• ESD protection on all pins
• Extended temperature range: -40°C to +125°C

Applications

The LMC6034's combination of features makes it ideal for numerous applications across various industries:

Industrial Systems

• Process control instrumentation
• Sensor signal conditioning
• Data acquisition systems
• Industrial automation controls

Consumer Electronics

• Portable audio equipment
• Battery-powered devices
• Signal processing circuits
• Active filters

Automotive Systems

• Sensor interfaces
• Battery monitoring
• Infotainment systems
• Engine control units

Medical Equipment

• Patient monitoring devices
• Portable medical instruments
• Biomedical sensors

Electrical Characteristics

The following specifications are typical at V_S = 5V, T_A = 25°C unless otherwise noted:

DC Characteristics

• Input Offset Voltage: 1 mV (max 5 mV)
• Input Bias Current: 0.04 pA (max 0.1 pA)
• Input Offset Current: 0.02 pA (max 0.05 pA)
• Common-Mode Rejection Ratio: 80 dB (min 70 dB)
• Power Supply Rejection Ratio: 90 dB (min 80 dB)
• Large Signal Voltage Gain: 100 dB (min 90 dB) at V_OUT = 1V to 4V
• Supply Current (per amplifier): 200 µA (max 300 µA)

AC Characteristics

• Gain Bandwidth Product: 1 MHz (typical)
• Slew Rate: 0.7 V/µs (typical)
• Equivalent Input Noise Voltage: 30 nV/√Hz at 1 kHz
• Total Harmonic Distortion: 0.01% at 1 kHz, V_OUT = 3V_pp
• Phase Margin: 60° (typical)

Power Supply Characteristics

• Supply Voltage Range: 3V to 15V single supply or ±1.5V to ±7.5V dual supplies
• Quiescent Current (all four amplifiers): 800 µA (max 1.2 mA) at V_S = 5V
• Power Supply Rejection: 90 dB (min 80 dB)

Package Information

The LMC6034 is available in several industry-standard packages to accommodate different design requirements:

14-Pin PDIP (Plastic Dual In-line Package)

• Package Code: N
• Dimensions: 19.3mm x 6.35mm x 4.57mm
• Pin Pitch: 2.54mm
• Operating Temperature Range: -40°C to +125°C

14-Pin SOIC (Small Outline Integrated Circuit)

• Package Code: D
• Dimensions: 8.65mm x 3.9mm x 1.5mm
• Pin Pitch: 1.27mm
• Operating Temperature Range: -40°C to +125°C

14-Pin TSSOP (Thin Shrink Small Outline Package)

• Package Code: PW
• Dimensions: 5mm x 4.4mm x 1mm
• Pin Pitch: 0.65mm
• Operating Temperature Range: -40°C to +125°C

Design Considerations

PCB Layout Guidelines

For optimal performance, follow these PCB layout recommendations:

• Use a ground plane to minimize noise and improve thermal performance
• Place bypass capacitors (0.1 µF ceramic) as close as possible to the power supply pins
• Keep high-frequency or high-current traces away from amplifier inputs
• Minimize trace lengths for sensitive analog signals
• Consider using guard rings around high-impedance input nodes

Thermal Considerations

While the LMC6034 has relatively low power consumption, thermal management is still important in high-density designs:

• Ensure adequate airflow around the package in high-temperature environments
• Use thermal vias when mounting in surface-mount packages
• Monitor junction temperature in applications near maximum ratings

Reliability and Qualification

The LMC6034 is designed and tested to meet stringent quality and reliability standards:

• ESD Protection: ±2000V Human Body Model
• Manufactured in qualified facilities with ISO 9001 certification
• Available in automotive-grade versions (AEC-Q100 qualified)
• RoHS compliant and lead-free